Annotation of src/usr.bin/tmux/cmd-pipe-pane.c, Revision 1.34
1.34 ! nicm 1: /* $OpenBSD: cmd-pipe-pane.c,v 1.33 2015/12/13 14:32:38 nicm Exp $ */
1.1 nicm 2:
3: /*
4: * Copyright (c) 2009 Nicholas Marriott <nicm@users.sourceforge.net>
5: *
6: * Permission to use, copy, modify, and distribute this software for any
7: * purpose with or without fee is hereby granted, provided that the above
8: * copyright notice and this permission notice appear in all copies.
9: *
10: * THE SOFTWARE IS PROVIDED "AS IS" AND THE AUTHOR DISCLAIMS ALL WARRANTIES
11: * WITH REGARD TO THIS SOFTWARE INCLUDING ALL IMPLIED WARRANTIES OF
12: * MERCHANTABILITY AND FITNESS. IN NO EVENT SHALL THE AUTHOR BE LIABLE FOR
13: * ANY SPECIAL, DIRECT, INDIRECT, OR CONSEQUENTIAL DAMAGES OR ANY DAMAGES
14: * WHATSOEVER RESULTING FROM LOSS OF MIND, USE, DATA OR PROFITS, WHETHER
15: * IN AN ACTION OF CONTRACT, NEGLIGENCE OR OTHER TORTIOUS ACTION, ARISING
16: * OUT OF OR IN CONNECTION WITH THE USE OR PERFORMANCE OF THIS SOFTWARE.
17: */
18:
19: #include <sys/types.h>
1.4 nicm 20: #include <sys/socket.h>
1.1 nicm 21:
22: #include <errno.h>
23: #include <fcntl.h>
24: #include <paths.h>
1.29 nicm 25: #include <stdlib.h>
1.1 nicm 26: #include <string.h>
1.13 nicm 27: #include <time.h>
1.1 nicm 28: #include <unistd.h>
29:
30: #include "tmux.h"
31:
32: /*
33: * Open pipe to redirect pane output. If already open, close first.
34: */
35:
1.25 nicm 36: enum cmd_retval cmd_pipe_pane_exec(struct cmd *, struct cmd_q *);
1.1 nicm 37:
1.4 nicm 38: void cmd_pipe_pane_error_callback(struct bufferevent *, short, void *);
39:
1.1 nicm 40: const struct cmd_entry cmd_pipe_pane_entry = {
1.34 ! nicm 41: .name = "pipe-pane",
! 42: .alias = "pipep",
! 43:
! 44: .args = { "ot:", 0, 1 },
! 45: .usage = "[-o] " CMD_TARGET_PANE_USAGE " [command]",
! 46:
! 47: .flags = CMD_PANE_T,
! 48: .exec = cmd_pipe_pane_exec
1.1 nicm 49: };
50:
1.22 nicm 51: enum cmd_retval
1.25 nicm 52: cmd_pipe_pane_exec(struct cmd *self, struct cmd_q *cmdq)
1.1 nicm 53: {
1.17 nicm 54: struct args *args = self->args;
1.33 nicm 55: struct client *c = cmdq->state.c;
56: struct window_pane *wp = cmdq->state.tflag.wp;
57: struct session *s = cmdq->state.tflag.s;
58: struct winlink *wl = cmdq->state.tflag.wl;
1.29 nicm 59: char *cmd;
1.18 nicm 60: int old_fd, pipe_fd[2], null_fd;
1.29 nicm 61: struct format_tree *ft;
1.1 nicm 62:
63: /* Destroy the old pipe. */
64: old_fd = wp->pipe_fd;
65: if (wp->pipe_fd != -1) {
1.4 nicm 66: bufferevent_free(wp->pipe_event);
1.1 nicm 67: close(wp->pipe_fd);
68: wp->pipe_fd = -1;
69: }
70:
71: /* If no pipe command, that is enough. */
1.17 nicm 72: if (args->argc == 0 || *args->argv[0] == '\0')
1.22 nicm 73: return (CMD_RETURN_NORMAL);
1.1 nicm 74:
75: /*
76: * With -o, only open the new pipe if there was no previous one. This
77: * allows a pipe to be toggled with a single key, for example:
78: *
79: * bind ^p pipep -o 'cat >>~/output'
80: */
1.17 nicm 81: if (args_has(self->args, 'o') && old_fd != -1)
1.22 nicm 82: return (CMD_RETURN_NORMAL);
1.1 nicm 83:
84: /* Open the new pipe. */
1.4 nicm 85: if (socketpair(AF_UNIX, SOCK_STREAM, PF_UNSPEC, pipe_fd) != 0) {
1.25 nicm 86: cmdq_error(cmdq, "socketpair error: %s", strerror(errno));
1.22 nicm 87: return (CMD_RETURN_ERROR);
1.1 nicm 88: }
89:
1.29 nicm 90: /* Expand the command. */
1.32 nicm 91: ft = format_create(cmdq, 0);
1.29 nicm 92: format_defaults(ft, c, s, wl, wp);
93: cmd = format_expand_time(ft, args->argv[0], time(NULL));
94: format_free(ft);
95:
1.1 nicm 96: /* Fork the child. */
97: switch (fork()) {
98: case -1:
1.25 nicm 99: cmdq_error(cmdq, "fork error: %s", strerror(errno));
1.29 nicm 100:
101: free(cmd);
1.22 nicm 102: return (CMD_RETURN_ERROR);
1.1 nicm 103: case 0:
104: /* Child process. */
105: close(pipe_fd[0]);
1.15 nicm 106: clear_signals(1);
1.1 nicm 107:
108: if (dup2(pipe_fd[1], STDIN_FILENO) == -1)
109: _exit(1);
110: if (pipe_fd[1] != STDIN_FILENO)
111: close(pipe_fd[1]);
112:
113: null_fd = open(_PATH_DEVNULL, O_WRONLY, 0);
114: if (dup2(null_fd, STDOUT_FILENO) == -1)
115: _exit(1);
116: if (dup2(null_fd, STDERR_FILENO) == -1)
117: _exit(1);
118: if (null_fd != STDOUT_FILENO && null_fd != STDERR_FILENO)
119: close(null_fd);
120:
1.16 nicm 121: closefrom(STDERR_FILENO + 1);
122:
1.29 nicm 123: execl(_PATH_BSHELL, "sh", "-c", cmd, (char *) NULL);
1.1 nicm 124: _exit(1);
125: default:
126: /* Parent process. */
127: close(pipe_fd[1]);
128:
129: wp->pipe_fd = pipe_fd[0];
1.5 nicm 130: wp->pipe_off = EVBUFFER_LENGTH(wp->event->input);
1.9 nicm 131:
1.4 nicm 132: wp->pipe_event = bufferevent_new(wp->pipe_fd,
133: NULL, NULL, cmd_pipe_pane_error_callback, wp);
134: bufferevent_enable(wp->pipe_event, EV_WRITE);
1.9 nicm 135:
1.18 nicm 136: setblocking(wp->pipe_fd, 0);
1.29 nicm 137:
138: free(cmd);
1.22 nicm 139: return (CMD_RETURN_NORMAL);
1.1 nicm 140: }
1.4 nicm 141: }
142:
143: void
1.30 nicm 144: cmd_pipe_pane_error_callback(__unused struct bufferevent *bufev,
145: __unused short what, void *data)
1.4 nicm 146: {
147: struct window_pane *wp = data;
148:
149: bufferevent_free(wp->pipe_event);
150: close(wp->pipe_fd);
151: wp->pipe_fd = -1;
1.1 nicm 152: }
![[BACK]](/icons/back.gif){kind=icon}
Return to cmd-pipe-pane.c CVS log ![[TXT]](/icons/text.gif){kind=icon}
![[DIR]](/icons/dir.gif){kind=icon}
Up to [local] / src / usr.bin / tmux